old material
old material
(OP)
We constructed a u stamp heat exchanger using asme viii 2010 design code. Our production use an old material from year 2006 for tubesheet.
does code accept using old material
does code accept using old material





RE: old material
Maybe prudent to check these things out before building.
Regards,
Mike
RE: old material
to me if the chemical composition and mechanical strength meet the current spec. it should be ok.
the problem is matching all the criteria between asme ii and astm 480 is tricky. later on i will upload the millcert here.
RE: old material
Regards,
Mike
RE: old material
RE: old material
If you have material certificates, from the top of my head, there is no problem. I think ASME VIII doesn't have any rule for material age. Anyway, just to be sure, I would check if the specification of A-480 has changed from 2006 to 2010.
I advice you to check ASME II because most of the time it states that SA XXX is similar to ASTM S XXX. If it is not similar usually it is stated what is different (no hardness test, no HE). So you can do yourself the extra requirements and turn ASTM material in to an ASME.
If you don't have papers of the material I think the only chance is to certify the material. You will need to prove the chemical composition, hardness,...For more details check UG-15.
RE: old material
RE: old material
When the production disobeys Q.C. then you have a bigger problem and you should not be fabricating any Code items, Genblr